Odhroerir pronounciation

I believe that the word Odhroerir is the old Norse for the symbol of the triple horn of Odin (is it referred to by any other names and how would those be pronounced?). Someone correct me if I am off track with this word but I'd be very interested to know the proper pronounciation of it (or as close as possible), if someone could give me a bit of help on this.

 

Thanks in advance.